The U.S. aircraft register, updated daily
Parts · Engine

Magneto

114 failure reports named the magneto in the last ten years, 734 since 1995, most often on the Piper PA-28 Cherokee, Warrior, Archer and Arrow; the condition most often found was "failed". 826 FAA approvals let 6 companies make a replacement magneto, Continental Motors INC holding the most (428).

Reports by year

014284155199520002005201020152020202542026
Reports by year, as a table
reports
199543
199638
199727
199836
199917
200028
200129
200233
200319
200427
200532
200622
200718
200836
200921
201021
201121
201233
201319
201455
201545
20166
20179
20184
20199
202016
20216
202214
202319
202416
202511
20264

Which system the reports file it under last ten years

Reports by system, as a table
reports
Engine112
Airframe structure2

How it failed the condition found, last ten years

failed29malfunctioned10unserviceable9damaged5defective5inoperative5contaminated4intermittent4loose4mismanufactured4
Conditions found, as a table
reports
failed29
malfunctioned10
unserviceable9
damaged5
defective5
inoperative5
contaminated4
intermittent4
loose4
mismanufactured4

Engines most often reporting it

Approved replacement parts 826 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a magneto and sell it as an approved part for the models named. These are the companies holding such approvals for a magneto:

For these models most: Pzl-Bielsko B1 (2), Northrop C-125 (2), Israel Aerospace Industriesltd G200 (1).

MakerPartReplacesFitsGrantedStatus
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349290-9LW-349290-9, LW-349290-9D, LW-11589,...Lycoming Engines TVO-435-F1A, VO-435-B1A2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349290-2LW-349290-2, LW-349290-2D, LW-349290-12,...Lycoming Engines TIGO-541-B1A, TIGO-541-D1A, TIGO-541-D1B2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349310-14LW-349310-14, 10-349310-14, BL-349310-14,S6RN-1209Lycoming Engines LTIO-540-J2B2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349310-4LW-349310-4, LW-349310-4D, LW-349310-12,...Lycoming Engines IGO-540-A1C, IGSO-540-A1A, IGSO-540-A1C2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349220-5643730, 646981, 10-349220-5, BL-349220-5, S6RN-1201Continental... IO-470-D, IO-470-E, IO-470-F2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349220-4633091, 643729, 646980, 10-349220-2,...Continental... GTSIO-520-D, GTSIO-520-E, GTSIO-520-F2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349260-6632959, 643808, 646983, 10-349260-1,...Continental... IO-470-D, IO-470-E, IO-470-F2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349310-1LW-349310-1, LW-349310-1D, 75453, 10-349310-1,...Lycoming Engines AEIO-540-D4B5, AEIO-540-D4D5, AEIO-540-L1B52025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349350-5640030, 643810, 646957, 653290, 10-349350-5,...Continental... IO-470-D, IO-470-E, IO-470-F2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349290-1LW-349290-1, LW-349290-1D, 75454, 10-349290-1,...Lycoming Engines AEIO-540-D4B5, AEIO-540-D4D5, AEIO-540-L1B52025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349290-17LW-349290-17, 10-349290-17, BL-349290-17, S6RN-1208Lycoming Engines LTIO-540-J2A2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349370-4LW-349370-4, LW-349370-4D, 75453, 10-349370-4,...Lycoming Engines AEIO-540-D4B5, HIO-540-A1A, IO-540-C4D52025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200, Series, 6 Cyl ES-349290-4LW-349290-4, LW-349290-4D, 75898, 10-349290-4,...Lycoming Engines TVO-435-B1B, TVO-435-D1A, TVO-435-G1A2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349310-10LW-349310-10, 10-349310-10, BL-349310-10,S6LN-1209 Lycoming Engines TVO-435-B1B, TVO-435-D1A, TVO-435-G1A2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349260-7633090, 643807, 646982, 10-349260-2,...Continental... GTSIO-520-D, GTSIO-520-E, GTSIO-520-F2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349290-3LW-349290-3, LW-349290-3D, 75456, 10-349290-3,...Lycoming Engines IGO-540-A1C, IGSO-540-A1A, IGSO-540-A1C2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349370-2LW-349370-2, LW-349370-2D, 75901, 10-349370-2,...Lycoming Engines GSO-480-B1J62025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349290-110-349290-1, BL-349290-1, S6LN-1208Lycoming Engines TIO-540-AF1A with STC SE04445AT...2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349260-3646959, 10-349260-3, BL-349260-3, S6RN-1205Continental... IO-520-K2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349350-6653317-1, 10-349350-6, BL-349350-6, S6LN-1225Continental... LTSIO-520-AE2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349310-8LW-349310-8, LW-349310-8D, 10-349310-8,...Lycoming Engines AEIO-540-D4B5, IO-540-G1D5, IO-540-K1B52025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349310-11LW-349310-11, LW-349310-11D, 10-349310-11,...Lycoming Engines TVO-435-F1A, VO-435-B1A2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349350-4640030, 643809, 646958, 653291, 10-349350-4,...Continental... IO-470-D, IO-470-E, IO-470-F2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349310-110-349310-1, BL-349310-1, S6LN-1209Lycoming Engines TIO-540-AF1A with STC SE04445AT...2025-11-10current
Hartzell Engine Technologies LLCMagneto Assembly, S-1200 Series, 6 Cyl ES-349350-7653317-2, 10-349350-7, BL-349350-7, S6LN-1225Continental... LTSIO-520-AE2025-11-10current
Hartzell Engine Technologies LLCMagneto ES63206320Continental... LTSIO-360-E, -EB, -KB2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63406340Lycoming Engines LTIO-540-AK1A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63806380Continental... IO-470-A, -C, -D2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63096309Continental... IO-470-D, -E, -F2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43724372Lycoming Engines O-235-K2B, -K2C, -L2A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43714371Lycoming Engines O-235-C2C, -H2C, N2C2023-12-01current
Hartzell Engine Technologies LLCMagneto ES4353ES4353Lycoming Engines O-360-A4M2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63946394Lycoming Engines LTIO-540-J2B2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63676367Continental... GO-300-A, -B, -C2023-12-01current
Hartzell Engine Technologies LLCMagneto ES10-391514-210-391514-2Continental... GTSIO-520-D, -H, -L2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63106310Continental... IO-470-A, -C, -D2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63516351Lycoming Engines O-540-A1B5, -A4A5, -A4B52023-12-01current
Hartzell Engine Technologies LLCMagneto ES63146314Continental... IO-360-A, -B, -C2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63606360Lycoming Engines IO-540-AG1A5, -AA1B5, TIO-540-A2B2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43454345Lycoming Engines IO-360-A1A, -A2A, -A2D-C1A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43014301Continental... C-75-12, -12F, -12FH2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43544354Lycoming Engines IO-320-C1A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43104310Continental... IO-240-B2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63106310Continental... IO-550-N2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63626362Continental... IO-470-A, -C, -D2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63136313Continental... IO-470-E, -F, -D2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63826382Continental... IO-470-A, -C, -D2023-12-01current
Hartzell Engine Technologies LLCMagneto ES10-349393-1010-349393-10Continental... IO-470-L, IO-520-B, -BA2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43744374Lycoming Engines LIO-360-C1E62023-12-01current
Hartzell Engine Technologies LLCMagneto ES43484348Lycoming Engines LIO-360-M1A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63796379Continental... E-165-2, -3, -42023-12-01current
Hartzell Engine Technologies LLCMagneto ES63776377Continental... E-165-2, -3, -42023-12-01current
Hartzell Engine Technologies LLCMagneto ES63246324Continental... LTSIO-520-AE, TSIO-360-A, -AB2023-12-01current
Hartzell Engine Technologies LLCMagneto ES6365ES6365Lycoming Engines TIO-540-U2A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63636363Lycoming Engines IO-540-AG1A5, TIO-540-A2B, -A2C2023-12-01current
Hartzell Engine Technologies LLCMagneto ES6364ES6364Continental... C-145-2, -2H, -2HP2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63556355Lycoming Engines O-540-A1A5, -A1B5, -A1C52023-12-01current
Hartzell Engine Technologies LLCMagneto ES63616361Lycoming Engines IO-540-AA1B5, TIO-540-W2A, -AF1A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63716371Lycoming Engines O-540-E4C5, IO-540-G1D5, -K1B52023-12-01current
Hartzell Engine Technologies LLCMagneto ES63506350Lycoming Engines HIO-390-A1A, O-540 -A1D5, -A4A52023-12-01current
Hartzell Engine Technologies LLCMagneto ES63936393Lycoming Engines O-540-A1D5, -A4D5, -B1A52023-12-01current
Hartzell Engine Technologies LLCMagneto ES63906390Lycoming Engines O-540-F1A52023-12-01current
Hartzell Engine Technologies LLCMagneto ES43094309Continental... IO-240-B2023-12-01current
Hartzell Engine Technologies LLCMagneto ES63806380Continental... IO-550-N2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43704370Lycoming Engines O-235-C1, -C1B, -C2A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43814381Lycoming Engines O-235-L2C, -F2A, -N2C2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43734373Lycoming Engines O-235-C1, -C2A, -E2A2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43474347Lycoming Engines O-235-C1B, O-320-A2C, -B2C2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43304330Continental... C-75-8, -8F, -8FH2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43024302Continental... A-65-1, -3, -62023-12-01current
Hartzell Engine Technologies LLCMagneto ES43424342Lycoming Engines O-320-D1A, -B2C, IO-320-B1C2023-12-01current
Hartzell Engine Technologies LLCMagneto ES43534353Lycoming Engines AEIO-320-D2B, AEIO-360-A1B6, AEIO-390-A1A62023-12-01current
Hartzell Engine Technologies LLCMagneto ES43334333Continental... A-65-1, -3, -62023-12-01current
Champion Aerospace LLCMagneto 4370Lycoming Engines 66GP-0SANNLycoming Engines IO-360-P1A2023-02-27current
Champion Aerospace LLCMagneto 4373Lycoming Engines 66GC25SFNNLycoming Engines IO-360-B1F6, IO-360-P1A2023-02-27current
Champion Aerospace LLCMagneto 4381Lycoming Engines 66GC05SFNNLycoming Engines O-235-F2A2023-02-27current
Champion Aerospace LLCMagneto 4371Lycoming Engines66GC20SFNNLycoming Engines AEIO-320-H1A, AEIO-320-H1B, IO-360-P1A2023-02-27current
Champion Aerospace LLCMagneto 4302Lycoming Engines66GP-0RANNLycoming Engines LIO-360-B1G62023-02-27current
Champion Aerospace LLCMagneto 4330Lycoming Engines66GC25RFNNLycoming Engines LIO-360-B1G62023-02-27current
Kelly Aerospace Energy Systems LLCMagneto ES43534353Lycoming Engines O-360-A4M2022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES43714371Lycoming Engines IO-320-D1A, IO-360-B4A, -C1A2022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES43704370Lycoming Engines O-320-E1A, AEIO-360-A1A, IO-390-D1A62022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES63406340Lycoming Engines LTIO-540-J2B2022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES63106310Continental... IO-550-N2022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES43734373Lycoming Engines O-320-E1A2022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES63206320Continental... TSIO-520-BE2022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES43454345Lycoming Engines IO-390-D1A6, -D1B6, -D3A62022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES63506350Lycoming Engines O-540-A1A52022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES43024302Lycoming Engines LIO-360-C1E6, -M1A, LO-360-A1H62022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES43474347Lycoming Engines IO-360-B1B2022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES63806380Continental... IO-550-N2022-06-08current
Kelly Aerospace Energy Systems LLCMagneto ES63146314Continental Motors IO-360-A, -B, -C2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63716371Lycoming Engines O-540-E4C5, IO-540-G1D5, -K1B52021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63106310Continental Motors IO-470-A, -C, -D2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES6380ES6380Continental Motors IO-470-A, -C, -D2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63206320Continental Motors LTSIO-360-E, -EB, -KB2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63506350Lycoming Engines HIO-390-A1A, O-540 -A1D5, -A4A52021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63796379Continental Motors E-165-2, -3, -42021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63516351Lycoming Engines O-540-A1B5, -A4A5, -A4B52021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63946394Lycoming Engines LTIO-540-J2B2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63636363Lycoming Engines IO-540-AG1A5, TIO-540-A2B, -A2C2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63406340Lycoming Engines LTIO-540-AK1A2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63136313Continental Motors IO-470-E, -F, -D2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63246324Continental Motors LTSIO-520-AE, TSIO-360-A, -AB2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63646364Continental Motors C-145-2, -2H, -2HP2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63096309Continental Motors IO-470-D, -E, -F2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63776377Continental Motors E-165-2, -3, -42021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63556355Lycoming Engines O-540-A1A5, -A1B5, -A1C52021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63826382Continental Motors IO-470-A, -C, -D2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63906390Lycoming Engines O-540-F1A52021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63936393Lycoming Engines O-540-A1D5, -A4D5, -B1A52021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63606360Lycoming Engines IO-540-AG1A5, -AA1B5, TIO-540-A2B2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63676367Continental Motors GO-300-A, -B, -C2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63626362Continental Motors IO-470-A, -C, -D2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63656365Lycoming Engines TIO-540-U2A2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES63616361Lycoming Engines IO-540-AA1B5, TIO-540-W2A, -AF1A2021-05-24current
Kelly Aerospace Energy Systems LLCMagneto ES43304330Continental Motors C-75-8, -8F, -8FH2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43454345Lycoming Engines IO-360-A1A, -A2A, -A2D-C1A2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43714371Lycoming Engines O-235-C2C, -H2C, N2C2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43744374Lycoming Engines LIO-360-C1E62021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43104310Continental Motors IO-240-B2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43024302Continental Motors A-65-1, -3, -62021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43474347Lycoming Engines O-235-C1B, O-320-A2C, -B2C2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43014301Continental Motors C-75-12, -12F, -12FH2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43734373Lycoming Engines O-235-C1, -C2A, -E2A2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43544354Lycoming Engines IO-320-C1A2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43424342Lycoming Engines O-320-D1A, -B2C, IO-320-B1C2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43094309Continental Motors IO-240-B2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43334333Continental Motors A-65-1, -3, -62021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43534353Lycoming Engines AEIO-320-D2B, AEIO-360-A1B6, AEIO-390-A1A62021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43484348Lycoming Engines LIO-360-M1A2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43814381Lycoming Engines O-235-L2C, -F2A, -N2C2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43724372Lycoming Engines O-235-K2B, -K2C, -L2A2021-05-21current
Kelly Aerospace Energy Systems LLCMagneto ES43704370Lycoming Engines O-235-C1, -C1B, -C2A2021-05-21current
Champion Aerospace LLCMagneto 4302Lycoming Engines 66GP-0RANNLycoming Engines LIO-360-B1G62020-11-22current
Champion Aerospace LLCMagneto 4330Lycoming Engines 66GC25RFNNLycoming Engines LIO-360-B1G62020-11-22current
Champion Aerospace LLCMagneto 4371Lycoming Engines 66GC20SFNNLycoming Engines AEIO-320-H1A AEIO-320-H1B IO-360-P1A2020-11-22current
Champion Aerospace LLCMagneto 4381Lycoming Engines 66GC05SFNNLycoming Engines O-235-F2A2020-11-22current
Champion Aerospace LLCMagneto 4373Lycoming Engines 66GC25SFNNLycoming Engines IO-360-B1F6 IO-360-P1A2020-11-22current
Champion Aerospace LLCMagneto 4370Lycoming Engines 66GP-0SANNLycoming Engines IO-360-P1A2020-11-22current
Champion Aerospace LLCMagneto 63806310Continental Motors IO-550-A, B, C2018-03-25current
Champion Aerospace LLCMagneto 4370Lycoming Engines 66GP-0SANNLycoming Engines IO-360-P1A2018-02-26current
Champion Aerospace LLCMagneto 4381Lycoming Engines 66GC05SFNNLycoming Engines O-235-F2A2018-02-26current
Champion Aerospace LLCMagneto 4373Lycoming Engines 66GC25SFNNLycoming Engines IO-360-B1F6, IO-360-P1A2018-02-26current
Champion Aerospace LLCMagneto 4371Lycoming Engines 66GC20SFNNLycoming Engines AEIO-320-H1A, AEIO-320-H1B, IO-360-P1A2018-02-26current
Champion Aerospace LLCMagneto 4330Lycoming Engines 66GC25RFNNLycoming Engines LIO-360-B1G62018-02-26current
Champion Aerospace LLCMagneto 4302Lycoming Engines 66GP-0RANNLycoming Engines LIO-360-B1G62018-02-26current
Champion Aerospace LLCMagneto 6361Lycoming Engines 66LC35SDNPLycoming Engines IO-540-AA1B5, TIO-540-AF1B, TIO-540-AH1A2017-11-06current
Champion Aerospace LLCMagneto 4342Lycoming Engines 66GP-0SAENLycoming Engines O-360-A1F62017-11-06current
Champion Aerospace LLCMagneto 4370Lycoming Engines 66GP-0SANNLycoming Engines AEIO-360-A1E6, AEIO-360-A2C, AEIO-360-B1F2017-11-06current

The first 150 of 400.

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.